How Doc Signer Works:

• Adding a digital signature to a document means you are the author of the document, have finalized its contents, and want to secure it against tampering after it has been distributed. digitally signed documents display a sign across the bottom of the document.
  
• Clicking the Logo opens a signature panel at the right side of the document and show valid certificate list in Valid Signature panel. If any Invalid Signature is there, it also shows it in this panel. Using Signature Details One can see the signing information and certificate properties.
  
• Dohatec CA is an approved authority in providing digital signature in Bangladesh. The timestamp on the signature easily verifies the time of signing the document and removes any questions about it.

Click on the Images for larger view

Figure: 1 Red ribbon indicates that this Word Document is digitally signed.

Figure: 2 Signature Panel shows the proof of document integrity. This panel lists all attached digital signatures with details.

Figure: 3 Valid digital signature for digitally signed Word Document.

Figure: 4 Yellow Warning Triangle indicates that the author cannot be verified. Do not Trust

Figure: 5 Red Cross indicates that that the document has been tampered with since it was signed by the author. Do not Trust